public class StringBufferDemo{
   public static void main(String [] args){
              StringBuffer buffer = new StringBuffer();
              buffer.append('S');
              buffer.append("tringBuffer");
               System.out.println(buffer.charAt(1));
              System.out.println(buffer.capacity());
              System.out.println(buffer.indexOf("tring"));
              System.out.println("buffer = " + buffer.toString());
        }
}
